log API usage for fsdp API in PyTorch (#64964)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/64964
log API usage for fsdp API in PyTorch
Test Plan: unit test
Reviewed By: rohan-varma
Differential Revision: D30915734
fbshipit-source-id: 5e3b335327f4a3ff59b025e8e17a0fa0b7f6597d
